net: ethernet: mtk_wed: remove wo pointer in wo_r32/wo_w32 signature

wo pointer is no longer used in wo_r32 and wo_w32 routines so get rid of
it.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/530537db0872f7523deff21f0a5dfdd9b75fdc9d.1698098459.git.lorenzo@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>